Robert walker



('No Model.) 3 Sheets-Sheet 1.

R. WALKER. BUILDING CONSTRUCTION.

No. 565,580. Patented Aug. 11, 1896.

WITNESSES.

, fly 706.3 A ll'orneys! THE NORRIS PETERS CO PHDTO L|YH., WASNYNGYON, D C.

(No Model.) 3 Sheets-Sheet 2.

R. WALKER. BUILDING CONSTRUCTION.

No. 565,580. Patented 55511, 1896.

THE NORRIS wmzns 00.. Puma-Lama, WASHIMGYON. n. c.

3 Sheets-Sheet 3.

(No Model.)

B WALKER BUILDING GONSTRUGTION. N0. 565,580.

Patented Aug. 11, 1896.

EMT/QM UNITED STATES PATENT OFFICE.

ROBERT WALKER, or LONDON,ENGLAND.

BUILDING CONSTRUCTION.

SPECIFICATION forming part of Letters Patent No. 565,580, dated August 11, 1896.

Application filed August 24,1895. Serial No- 560,418. (No model.)

To a, whom it may concern:

Be it known that I, ROBERT WALKER, a subject of the Queen of Great Britain and Ireland, residing at Birkenhall, Stafford, London, in the county of Essex, England, have invented certain new and useful Improvements in Building Construction; and I do hereby declare the following to be a full, clear, and exact description of I the invention, such as will enableothers skilled in the art to which it appertains to make and use the same. This invention has for its object to enable structures such. as a wall, partition, conduit, or the like tobe readily built up with smooth and even surfaces and, if desired, without the aid of cement or mortar; and it consists,

essentially, in forming the Walls of the structure of bricks or slabs adapted to interlock with one another, so that by-arranging the sets of bricks or slabs to break joint with one another in every direction a continuous rigid structure is built up.

The structure may be formed solid of such bricks or slabs, or hollow, and the hollow parts can be filled with cement, concrete, or mortar.

In the accompanying three sheets of illustrative drawings, Figure 1 is an isometric view of a hollow wall filled up with concrete constructed according to this invention. Fig. 2 is an isometric View of a wall built up entirely of bricks or tiles. Fig. 3 is an isometric viewof a pipe-conduit for sewers and the like; and Fig. 4 i's'a similar View to Fig. 2, showing a stronger and thicker construction.

Referringto Fig. 1, the faces of the structure are formed by slabs 04, having dovetailed grooves 17, with corresponding projections c on their back surfaces. The slabs of each face are secured together by grooved. blocks cl, securing in their relative positions two adjacent slabs a in one row and another slab a situated in the adjacent row and breaking In the arrangement shown in Fig. 2 the structure is built up entirely of slabs a, the projections c on one slab fitting into the grooves bin the adjacent slabs. In this case, also, the slabs of the two faces are arranged to break joint in every direction both vertically and horizontally. The corncr-piecesfarc slightly modified in shape, being of L shape, and are placed alternately in opposite directions, as shown. The corner of each outside piece f is formed with a dovetail recess, in which fits a projection on the inside piece f. The parts maybe rigidly secured by a cement or other fronting.

The circular conduit shown in Fig. 3 is built up of the inside slabs h and the outside slabs Z, which are arranged to break joint both horizontally and vertically. An egg or other shaped sewer can be built up in a similar way with suitably-shaped slabs or bricks.

In the structure shown in Fig. 4 the one face of the wall has the grooves b and projections 0 in the slabs 0, arranged horizontally ters Patent, is

1. A building block or brick consisting of a base and equally-spaced dovetailed projections having parallel edges and situated on and extending across one face, the width of the said brick being a multiple of the distance between the center lines of the projections and the projections being equal in size to or less than the grooves left between the projections so as to enable two adjacent courses to be bonded together.

2. A building block or brick consisting of the center lines of the grooves so as to enable a grooved block the grooves being dovetail in two adjacent courses to be bonded together. IO

shape and having parallel edges and eXtend- In testimony whereof I affix my signature ing across the block and being equally spaced in presence of two witnesses.

5 and of such size that the groove is the same ROBERT WVALKER.

size as or larger than the dovetail projection \Vitnesses: left between two grooves and the Width of the JOHN F. GAIRNS, block being a multiple of the distance between JOSEPH LAKE. 

